Copper Alloy No. C95800

Alpha Nickel Aluminum Bronze CDA 958

ASTM B 505 , ASTM B 271

Chemical Composition % by weight

 

Element	Nominal	Minimum	Maximum
Aluminum	9	8.5	9.5
Copper	81	79	-
Iron	4	3.5	4.5
Manganese	1	.8	1.5
Nickel	5	4	5
Silicon	-	-	.10

 

Applications

Propeller hubs, blades and other parts in contact with salt water.

Hardness*	Brinell Hardness (3000 kg load)	159
Tensile Strength**	KSI	90
Yield Strength **	KSI (0.5% Ext. under load)	38
Elongation**	% in 2 inch	18

**Test values are nominal approximations and depend on specimen size and orientation.

Physical Properties

Thermal Conductivity	BTU/ (sq ft-ft-hr-F)	20.8
Specific Heat	BTU/lb/ºF @ 68F	.105
Thermal Expansion	Per °F from 68 F to 572 F	.000009
Density	lb/cu in @ 68 F	.276
Electrical Conductivity* (Annealed)	% IACS @ 68 F	7.1
Modulus of Elasticity	KSI	16,500

*Volume basis

Stress relieving temperature	600 F or 316 C
Time at temperature	1 hour per inch of section thickness
Responds to heat treatment	*
Machinability rating (Free Cutting Brass=100)	50
Suitability for being joined by:	Soldering/Good
	Brazing/Fair
	Oxyacetylene Welding/Not Recommended
	Carbon Arc Welding/Poor
	Gas Shielded Arc Welding/Good
	Coated Metal Arc Welding/Good

*Castings exposed to seawater or other aggressive environments should be temper annealed.

The values listed above represent reasonable approximations suitable for general engineering use. Due to commercial variations in composition and to manufacturing limitations, they should not be used for specification purposes. See applicable A.S.T.M. specification references.

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